CAT C11 Engine

Caterpillar C11 ACERT – Engine Specifications

Engine Type

• Inline 6-cylinder, 4-stroke diesel

• ACERT™ technology (Advanced Combustion Emissions Reduction Technology)

Displacement

• 11.1 L (680 in³)

Bore x Stroke

• 130 mm x 140 mm

• 5.12 in x 5.51 in

Rated Power (typical industrial ratings)

• 350–450 HP (261–336 kW)

• Common oilfield ratings:

  • 350 HP @ 2100 RPM

  • 425–450 HP @ 1800–2100 RPM (varies by ECM software & perf spec)

Peak Torque

• Up to 1,550 lb-ft (≈2100 Nm), depending on rating

Rated Speed

• 1800 or 2100 RPM

Aspiration

• Turbocharged & aftercooled (ATAAC)

Fuel System

• Electronically controlled unit injection (HEUI)

Compression Ratio

• ~16.0 : 1

Emissions

• EPA Tier 2 / Tier 3 (depends on year & ECM configuration)

Cooling System

• Jacket water cooled

• Thermostat opening: ~190°F (88°C)

Oil Capacity

• ~7–8 gallons (26–30 L), depending on pan

Dry Weight

• Approx. 2,500–2,700 lb (1,135–1,225 kg), industrial trim

Typical Oilfield / Well Service Uses

• Mud pumps

• Cementing units

• Frac support equipment

• Generator drives

• Water transfer pumps